Malicious PDF — malware analysis report

Static analysis result for SHA-256 706ab646d61aaf10…

MALICIOUS

PDF

93.3 KB Created: 2021-04-05 04:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 186891a12129db71df89c88d58516b21 SHA-1: 12153b5747852e4e5fee7bb66395c73c1c047f3f SHA-256: 706ab646d61aaf106e197a01cb305c5100c0a0b01c1b8d88fcaeeda102d9c0cb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/strik?utm_term=the+rocking+horse+winner+questions+pdf PDF link annotation
    • http://italysummer.fun/bupixakebiakr7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404122/normal_5fec0a36479c1.pdfIn PDF document text
    • https://lovelutunaguj.weebly.com/uploads/1/3/4/7/134735325/e4a1238d992dfcb.pdfIn PDF document text
    • http://xawuzina.iblogger.org/programa_para_convertir_en_ingles_a_espaol.pdfIn PDF document text
    • http://crysety.xyz/390443423554joii.pdfIn PDF document text
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/5437543.pdfIn PDF document text
    • http://stopro.store/fisigibasuvovelivibopefake9go.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_603eb14863e1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367914/normal_5ffa95dec1f78.pdfIn PDF document text
    • http://sbrf.link/sole_e25_elliptical_best_price4vc5z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484635/normal_6022003fb1463.pdfIn PDF document text
    • http://subbellassecret.com/linux_system_programming_tutorial_pointropjy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wizitifowubux/the_eighth_habit_from_effectiveness_to_greatness.pdfIn PDF document text
    • http://kegunujav.epizy.com/bowling_performance_in_world_cup_2019.pdfIn PDF document text
    • http://gazezubutajon.rf.gd/electrical_circuit_breaker_types.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/the_game_plan_2008_dvd.pdfIn PDF document text
    • http://dolipefutulej.epizy.com/akshara_song_badhai_ho_badhai.pdfIn PDF document text
    • http://tufobiwileke.rf.gd/rorikurenogugagivofo.pdfIn PDF document text
    • http://dolipefutulej.epizy.com/how_to_connect_directv_genie_to_internet_wirelessly.pdfIn PDF document text
    • http://purevaxa.epizy.com/45925415481.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/king_platform_bed_low_headboard.pdfIn PDF document text
    • http://fodixox.rf.gd/texuxonabopo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6C 5288 bytes
SHA-256: bcdc194dd4723f815da159d187861f46912979909edcebfcc3fc4e1aad00ef1b
font_01_sfnt_off00013174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13174 11416 bytes
SHA-256: cbda7eadae8625111d2e2e6eae4f1af26005ad1e375c7a64a91b46b203d45b50
font_02_sfnt_off00015822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15822 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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